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J. Duke 2007-12-01 00:00:00 +00:00
parent 686d76f772
commit 8153779ad3
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hotspot/src/share/vm/runtime/rframe.hpp Normal file
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/*
* Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
// rframes ("recompiler frames") decorate stack frames with some extra information
// needed by the recompiler. The recompiler views the stack (at the time of recompilation)
// as a list of rframes.
class RFrame : public ResourceObj {
protected:
const frame _fr; // my frame
JavaThread* const _thread; // thread where frame resides.
RFrame* _caller; // caller / callee rframes (or NULL)
RFrame*const _callee;
const int _num; // stack frame number (0 = most recent)
int _invocations; // current invocation estimate (for this frame)
// (i.e., how often was this frame called)
int _distance; // recompilation search "distance" (measured in # of interpreted frames)
RFrame(frame fr, JavaThread* thread, RFrame*const callee);
virtual void init() = 0; // compute invocations, loopDepth, etc.
void print(const char* name);
public:
static RFrame* new_RFrame(frame fr, JavaThread* thread, RFrame*const callee);
virtual bool is_interpreted() const { return false; }
virtual bool is_compiled() const { return false; }
int distance() const { return _distance; }
void set_distance(int d);
int invocations() const { return _invocations; }
int num() const { return _num; }
frame fr() const { return _fr; }
JavaThread* thread() const { return _thread; }
virtual int cost() const = 0; // estimated inlining cost (size)
virtual methodHandle top_method() const = 0;
virtual javaVFrame* top_vframe() const = 0;
virtual nmethod* nm() const { ShouldNotCallThis(); return NULL; }
RFrame* caller();
RFrame* callee() const { return _callee; }
RFrame* parent() const; // rframe containing lexical scope (if any)
virtual void print() = 0;
static int computeSends(methodOop m);
static int computeSends(nmethod* nm);
static int computeCumulSends(methodOop m);
static int computeCumulSends(nmethod* nm);
};
class CompiledRFrame : public RFrame { // frame containing a compiled method
protected:
nmethod* _nm;
javaVFrame* _vf; // top vframe; may be NULL (for most recent frame)
methodHandle _method; // top method
CompiledRFrame(frame fr, JavaThread* thread, RFrame*const callee);
void init();
friend class RFrame;
public:
CompiledRFrame(frame fr, JavaThread* thread); // for nmethod triggering its counter (callee == NULL)
bool is_compiled() const { return true; }
methodHandle top_method() const { return _method; }
javaVFrame* top_vframe() const { return _vf; }
nmethod* nm() const { return _nm; }
int cost() const;
void print();
};
class InterpretedRFrame : public RFrame { // interpreter frame
protected:
javaVFrame* _vf; // may be NULL (for most recent frame)
methodHandle _method;
InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const callee);
void init();
friend class RFrame;
public:
InterpretedRFrame(frame fr, JavaThread* thread, methodHandle m); // constructor for method triggering its invocation counter
bool is_interpreted() const { return true; }
methodHandle top_method() const { return _method; }
javaVFrame* top_vframe() const { return _vf; }
int cost() const;
void print();
};
// treat deoptimized frames as interpreted
class DeoptimizedRFrame : public InterpretedRFrame {
protected:
DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const callee);
friend class RFrame;
public:
void print();
};